STREET PERFORMANCE CAMSHAFTS
GENERAL MOTORS Use your browser's back button to return to the table of contents
CODE PART # SAE
DURATION		 .O50
DURATION		 VALVE
LIFT		 LOBE
CENTERLINES		 LASH
HOT
  in      ex in      ex in      ex in/ex in/ex
BUICK V-6 196, 231, 252, 1979-86 W/INTEGRAL GEAR
* A 40-9002 259    271 190    202 .413     .437 107/117 Hyd
* B 40-0414 270    280 204    214 .448     .472 107/117 Hyd
* B 40-0808 282    282 208    208 .448     .448 105/116 Hyd
  40-8888 CUSTOM PROFILES
BUICK V-8 350 "B" "H" "J" "X" 1968-81
* B 41-0909 266    266 209    209 .440     .440 105/115 Hyd
  41-8888 CUSTOM PROFILES
BUICK V-8 400, 430, 455 1965-76
C 42-1818 284    284 218    218 .488     .488 108/112 Hyd
  42-8888 CUSTOM PROFILES
CADILLAC V-8 368, 425, 472, 500
* B 80-0909 266    266 209    209 .440     .440 105/115 Hyd
C 80-1818 284    284 218    218 .488     .488 108/112 Hyd
  80-8888 CUSTOM PROFILES
CHEV. V-6 173 (2.8L) 189 (3.1L) 1980-89
* B 52-0414 270    280 204    214 .420     .443 107/117 Hyd
* B 52-0808 280    280 208    208 .420     .420 105/115 Hyd
  52-8888 CUSTOM PROFILES
CHEV. V-6 200, 229 1978-84
* B 53-0414 270    280 204    214 .420     .443 107/117 Hyd
* C 53-1424 280    290 214    224 .443     .465 107/117 Hyd
  53-8888 CUSTOM PROFILES
CHEV. V-6 262 (4.3L) 1985-88
* B 57-0213 269    284 202    213 .410     .410 111/115 Hyd
  57-8888 CUSTOM PROFILES
CHEV. L-6 194, 230, 250 1964-84
* A 54-9404 260    270 194    204 .464     .490 107/117 Hyd
C 54-2424 308    308 224    224 .509     .509 106/110 Hyd
  54-8888 CUSTOM PROFILES
CHEV. L-6 292 1964-89
* A 55-9404 260    270 194    204 .464     .490 107/117 Hyd
  55-8888 CUSTOM PROFILES
CODE PART # SAE
DURATION		 .O50
DURATION		 VALVE
LIFT		 LOBE
CENTERLINES		 LASH
HOT
  in      ex in      ex in      ex in/ex in/ex
CHEV. V-8 262, 267, 283, 302, 305, 307, 327, 350, 400 1957-89
(EXC. ROLLER LIFTERS)
* A 50-8494 242    252 184    194 .368     .398 104/114 Hyd
* A 50-9002 258    269 190    202 .387     .410 107/117 Hyd
* A 50-9404 252    262 194    204 .398     .420 107/117 Hyd
* A 50-0208 256    262 202    208 .425     .435 105/110 Hyd
* B 50-0414 262    272 204    214 .420     .443 107/117 Hyd
* B 50-0909 266    266 209    209 .414     .414 105/115 Hyd
* B 50-1414 280    280 214    214 .444     .444 105/115 Hyd
* C 50-1424 272    282 214    224 .444     .465 107/117 Hyd
* C 50-1818 295    295 218    218 .458     .458 106/114 Hyd
C 50-2222 306    306 222    222 .447     .447 114/114 Hyd
C 50-2031 304    287 220    231 .468     .480 106/114 Hyd
C 50-2424 282    282 224    224 .465     .465 109/119 Hyd
C 50-2434 282    292 224    234 .465     .488 109/119 Hyd
D 50-3030A 287    287 230    230 .480     .480 106/114 Hyd
D 50-3030B 287    287 230    230 .480     .480 106/110 Hyd
E 50-4646 302    302 246    246 .509     .509 106/112 Hyd
E 50-4747 280    280 247    247 .500     .500 106/110 .028  .030
E 50-5060 285    295 250    260 .533     .555 104/108 .026  .028
E 50-5664A 287    295 256    264 .504     .504 100/110 .024  .026
E 50-5664B 287    295 256    264 .537     .557 100/110 .024  .026
  50-8888 CUSTOM PROFILES
CHEV. 262, 267, 283, 302, 305, 307, 350, 400 (1957-85 WITHOUT HYD.
     ROLLER LIFTERS AS STD. EQUIPMENT)
NOTE: These cams must use part #50532 hyd.roller lifters. They must also
     use a cam button and can use the stock distributor gear. They will not fit
     laterengines that come from the factory with roller cams.
B HR50-0610 260    266 206    210 .499     .499 105/115 Hyd
C HR50-1015 288    284 210    215 .462     .470 105/115 Hyd
C HR50-1524 270    280 215    224 .500     .525 107/117 Hyd
  HR50-8888 CUSTOM PROFILES
CHEV. 305, 350 1985-90 W/FACTORY HYD. ROLLER LIFTERS
     These cams use OEM-style hyd. roller lifters.
B FR50-9200 246    256 192    200 .450     .465 105/115 Hyd
B FR50-9810 273    288 198    210 .435     .462 107/117 Hyd
C FR50-0610 260    266 206    210 .499     .499 105/115 Hyd
C FR50-1015 288    284 210    215 .462     .470 105/115 Hyd
C FR50-1524 270    280 215    224 .500     .525 107/117 Hyd
C FR50-3030 306    306 230    230 .480     .480 104/112 Hyd
  FR50-8888 CUSTOM PROFILES
CODE PART # SAE
DURATION		 .O50
DURATION		 VALVE
LIFT		 LOBE
CENTERLINES		 LASH
HOT
  in      ex in      ex in      ex in/ex in/ex
CHEV. 366, 396, 402, 427, 454
* A 51-9404 252    262 194    204 .450     .476 105/115 Hyd
* B 51-0414 270    280 204    214 .476     .501 107/117 Hyd
* B 51-0909 266    266 209    209 .465     .465 105/115 Hyd
* C 51-1424 280    290 214    224 .501     .527 107/117 Hyd
* C 51-3030 309    309 230    230 .531     .531 105/115 Hyd
* D 51-2838 286    296 234    244 .553     .578 107/117 Hyd
E 51-3848 296    306 244    254 .578     .603 107/117 Hyd
  51-8888 CUSTOM PROFILES
OLDSMOBILE V-8 260F, 307, 350R, 403, 455 1968-86
B 60-0414 262    272 204    214 .448     .474 107/117 Hyd
C 60-1424 272    282 214    224 .474     .498 107/117 Hyd
D 60-3333 328    328 233    233 .474     .474 111/115 Hyd
D 60-3444 306    316 234    244 .520     .542 107/117 Hyd
CALL FACTORY FOR 1964-67 MODELS DUE TO DIFFERENT
LIFTER BANK ANGLES
PONTIAC 287, 301, 316, 326, 347, 350, 370, 389, 400, 421, 428, 455 1956-81
* B 70-0414 262    272 204    214 .420     .443 107/117 Hyd
C 70-1424 272    282 214    224 .443     .465 107/117 Hyd
D 70-3131 287    287 231    231 .480     .480 105/115 Hyd
  70-8888 CUSTOM PROFILES
PONTIAC L-4 151 1979-84
A 71-0902 261    273 190    202 .452     .478 108/114 Hyd
  71-8888 CUSTOM PROFILES
CHEVROLET 153 (63-70) 181 INDUSTRIAL AND MARINE
A 74-0909 266    266 209    209 .480     .480 107/117 Hyd
  74-8888 CUSTOM PROFILES

GENERAL MOTORS TECH TIPS

VALVE SPRINGS The dual springs on most big block Chevys will not tolerate much more than stock lift.Replace these springs with aftermarket springs to accommodate the higher lifts required by even fairly mild cams. Be sure to check lift before you start the engine.
1.6 AND OTHER INCREASED RATIO ROCKERS Higher-than-stock-ratio rockers move the pushrod closer to the stud. 
You must check the clearance between the pushrod and the head at maximum lift. 
Also check clearance at the guide plate if used.  Camcraft offers a "louis tool" to easily elongate the pushrod slot using a simple hand drill.
OIL SEALS Installing any higher lift cam may result in insufficient clearance between the spring retainer and the oil seal or valve guide. Assemble the valve,oil seal,and retainer without the spring. Then measure the clearance from the top of the seal to the retainer. Make sure the space is greater than the lift of the cam.
ROCKER ARM SLOTS High lift cams frequently cause the slot in the rocker arm to hit the stud. Always check the rise at maximum lift, change to long slot rockers if necessary. A bent paper clip makes a good measuring tool.
NON-ADJUSTABLE VALVE TRAINS
Buick, Olds, and Cadillac have non-adjustable valve trains. In some cases, longer pushrods are be required to accommodate  the smaller base circles required by the increased lift. CAMCRAFT stocks these special pushrods.

 

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